There are total 18 hours or 1080 minutes from 7am to 1am. In words, this duration is equal to eighteen hours or one thousand eighty minutes.
How many hours from
| 1AM to 3AM | 2PM to 10PM | 7PM to 7AM |
| 5PM to 7AM | 8PM to 6AM | 1PM to 11AM |
| 1PM to 7AM | 12PM to 7PM | 1AM to 7AM |
| 8PM to 1PM | 11PM to 9AM | 2PM to 7PM |
| 7PM to 10AM | 2AM to 9AM | 3PM to 8AM |
| 3PM to 7PM | 10PM to 3AM | 9PM to 2PM |
